Drafting apparatus.



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J. B. NELSON. DRAFTING APPARATUS.

APPLICATION FILED MAILZB, 1914.

1 ,109,864 Patented Sept. 8, 1914.

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iffolwqyi J. E. NELSON. DRAFTING APPARATUS. APPLIUATIQNEILBD MAR. 26, 1914.

Patented Sept. 8, 1914.

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PATENT OFFICE. I

' JAMES E. nELso'n, or LANCASTER, new YORK.

DRAFTING APPARATUS.

Specification of Letters Patent. Application filed March as, E1914. Serial No. 827383.

Patented Sept. 8, 1914.

To all whomjt may concern: 7

Be it known that 1, JAMES E. Nnnson, a citizen of the United States, residing at Lancaster, in the county of Erie; and State of New York, have invented a new and useful Improvement in Drafting Apparatus, 'of which the following is a s V ecification.

This invention relates to rafting appa- 'ratus and more particularly to apparatus .for teaching the principles of mechanical drawing.

The objects of the inventlon are produce an apparatus of this kind by WhlCh the student can be readily made to understand view or pro ections of how to correctly represent the various views an object and how they should be placed with relation to each other on 'the drawing, and which can also b3 as a drawing board or table. In the accompanying ing of two sheets: Figure 1 is. a perspective f an apparatus embodying the invention. .Figs. 2 and 3, are respectively a front elevation and a topplan view thereof. Fig. 4 is a front elevation thereof showing the transparentplate in a vertical position in front of the object. Fig. 5 is a plan view thereof, showing the parts in the same .posi- .tionas in Fig. 4..

Fig. 6 is a front elevation thereof showin the transparent plate at the side of the ob ect. Figs. 7 and 8 are respectively a side elevation and a top plan view thereof showing the parts in the positions shown in Fig. 6. Fig. 9 is afragmentary sectional elevation on line"; 99, Fig. 5.

Fig. 10 is a fragmentary sectional view of.

the; transparent plate on line 10-10, Fig. 3.

Briefly stat'ed,.the apparatus comprises a suitable support parent plate which is .pivotally mounted on the support or base so that it can be swung about a vertical axisand also about a horizontal axisto-place it in different positions relative to a holder for the object or model to be drawn. By arranging the parts relatively to, each other in this way, the transparent plate can'be supported eitherhorizontally over the object. or vertically in front of or atthesid'e thereof, or in any intermediate or inclined .position'so that the object can;

be seen through the plate and traced thereon in plan, or in different elevationsior perspective. I

The support or base A ]of the -.apparatus drawings, consist- -I hor zontal bar havin upright. end arms 0 or base and a glass or transattachment to a table or other supporting device. In'the construction shown, the support A is in the form of a pedestal adapted torest on a floorand its upper art forms a hollow bearing inwhich is held an upright ipost B on the upper end of which a bracket :0 is mounted. This post is adjustably held fby a bushing b in the upper part of the pedestal. The 0st B is rotatably and ver-' tical1y adjustable in the bushing 72 and may be held in its adjusted position by any suitable means. For example,- the upper part of Ethe bushing is slotted, as shown in Fig. 9, and provided with a tapered thread on which a nut b screws to contract the slot: f ted part of the bushing on the post and thus firmly clamp and'hold the post stationary.

The bracket C consists of a substantially between the upper en s of which the transparent drawingplate E is ported to swing vertically, preferably by means of a supporting frame he bracket 0 is preferably pivoted in the slotted or bifurcated upper end of the post B by a screw 0' provided atone end with a handle whereby the screw can be tightened for clamping the bracket C in the bifurcated portion of the post to hold the same in any desired position.

The plate supporting frame D shown comprises a rod J pivotally mounted on the pivotally supupright ends of the bracket C and having 7 arms d 6? connecting the rod d with supporting bars d on which'the plate is socured. Any suitable means may ployed for pivotally mountingthe plate supporting frame D on the bracket C an holding itin' an desired position relatively to the bracket For instance, the. ends of be em the rod 02 are provided with conical sockets in which the conical ends ofscrews (Z engage. These screws have a threaded engagernent in the upper ends of the arms a of the bracket C and, when screwed up tightly againstthe ends of the rod 01, will clamp the frame I) in any position in-which it is set. When the screws cl engage the rod loosely, the frame D can be swung to different ositions about the screws as a center. d indicateslock nuts for holding the set screws in adjusted positions.

The supporting bars d for the drawing.

plate E are preferably provided with bentover ends d adapted to embrace the edges of the plate, and screws d d extending through the ends of the supporting bars, serve to hold the glass plate firmly against ipovement relatively to the supporting mem- 'ers.

While the plate supporting frame D piv otally mounted on the bracket C as described is a desirable construction, the invention is not restricted to this construction and the transparent drawing plate could be mounted to swing vertically on a horizontally rotatable bracket or support in other ways. It is desirable to provide in connection with a device of this kind, a suitable holder for the object or model tobe drawn. In the construction shown, the object F is placed on a shelf or holder G having an arm 9 secured on the base A. The arm shown has a part resting on the upper end of the pedestal of the base and is held against movement relatively thereto by pins 9 extending into sockets in the pedestal. The holder G may, however, be of any other suitable construction and can be supported in other ways.

In the use of this device for demonstrating the principles of mechanical drawing, the transparent plate E ismoved into a horizontal position over the object, as indicated in Figs. 1, 2 and3, whereupon a plan view'of the object F can be seen by looking 35 down through the plate. The plan view can then be readily traced on the plate as indi- Gated at f. In order to explain the manner of representing the front elevation and its relation to the plan view, the plate E and into the position shown in Figs. 4: and 5.

When the plate is inthis position, the front elevation .of the object can be seen through I the plate and traced thereon as indicated at f. By swinging the bracket 0 in the pedestal of the support A, the plate E can be swung to the side of the object and the side 1 elevation traced thereon in a similar man ner. It will be seen, by referring to Fig. 7, that the several views when drawn on the plate E will be in the proper relation with regard to each other providing the observer views the object'in a direction perpendicular to the plate from the point thereof through which he sees the object. The various views can then. be connected byprojection lines 2 if desired. The apparatus will firmly fix. 1n the mind of the student the manner in which on a drawing and also the relative position of any one view withregard to the other views. The plate E is universally adjustable relatively to the object andcan be supported in any desired relation thereto so that erspective views of the object can be releasably frame D are swung on their horizontal axesthe views of an. object should be represented.

traced on the plate in the same manner as already described with reference to the plan and elevational views.

H H represent spring clips secured to the underside of the bent-over ends (Z of the frame D and yieldingly pressing against the plate E. The clips are adapted to hold a sheet of paper on the plate E in case it is desired to use the apparatus as a drawing table.

I claim as my'invention:

1. In an apparatus of the kind described, the combination with a holder for an object, of a transparent plate, means for supporting the plate to be rotatably adjusted horizontally and vertically to different positions relative to said object, and means for holding the plate in adjusted position.

2. In an apparatus of the kind described, the combination with a holder for an object, ofa transparent plate, a support on which said'plate is mounted to swing to a position over said object or at a side thereof, and means for holding the plate in the posi tion in which it is set. a

3. In an apparatus of the 'kind described,

the combination of a base, a transparent plate, and abracket pivoted on the base to swing horizontally and to which said plate is pivoted to swing vertically.

4. Inan apparatus of the kind described, the combination ofa base, .a transparent plate, and a bracket pivbted to swim 1n one. plane relatively to said base, said p ate being pivotally mountedon said bracket to swing in a plane substantially perpendicular to said firstmentioned plane.

5. In an apparatus of the kind described, the COIHbiHatIOII Of a base, a transparent plate, a bracket pivoted to swing'in one plane relatively to said base, and a'frame supporting said plate and pivotally supported on said bracket to swing in a plane substantially perpendicular to said first mentionednplane.

6. In an apparatus of the kind described, the combinationof-a base havinga vertical bearing, a bracket ivoted in said bearing to swing horizontally, a frame pivoted on said bracket to swing m a substantially vertical plane, and a transparent plate supported by said frame. Y a

In an apparatus of. the kind described,

the combination of a: basehaving a vertical bearing, a bracket pivoted in said bearing to swing horizontally and having upwardly. extending arms, a frame pivoted on said upwardly extending arms of the bracket, and a transparent plate supported by 'saidframe. 8. In an apparatus of the kind described, the combination of a base, a transparent plate, a bracket pivoted on said base to swing in a substantially horizontal plane,

anda frame supporting said transparent plate and comprising a substantially boricarried'by said frame,

the combinatwn of a base, a post zontal rod pivoted insaid bracket, and arms extending outwardly from said rod. and supporting said plate.

9. In an apparatus of; the kind described, ivoted to said base, a bracket pivoted to sa1d post, a frame pivoted to said bracket, and a plate carried by said'frame. 10. In an apparatus of the kind described, the combination of a base, a post ivoted to said base to swing in a horizonta plane, a bracket pivoted to said post to swing in a plane perpendicular thereto, a frame pivoted to said bracketand adapted to swin in a plane perpendicular to each of said ot er two planes, anda plate supported on said frame.

11. In an apparatus of the kind described, the combination of a base, a post pivoted to said'base, a bracket frame pivoted to sai bracket, and a plate said post being adin said base to regulate justable verticall plate with regard to said the height of sai base. I 4

12. In an apparatus of the described.

pivoted to said post, a

the combination .with abase having an upright bearing portion, a bushing in said bearing port1on of the base, a post held in said bushing and adjustable relatively time to, a bracket pivoted on saidpost, and a plate ivotally mounted on said bracket.

13. the combination of a base, a holder for an object mounted on said base, of a transparent plate, means pivoted on said base for supporting said p ate in dide'rent positions re atively to'sald holder, and means for holdin the plate inan adjusted osition.

14. n an apparatus of thekin described, the combination of a base, a holder for an object mounted on said base, ent late, a bracket pivotally "mounted on said ass and to which said plate is pivoted whereby the plate may be movedin difierent planes to dlfierent said object. Witness 1914.

' p 7 JAMES E. NELSON.

witibessas P.

n. L. Mfi?" ii an apparatus of the kind described,

of a transparpositions relatively to my hand, this 21st day of March, 

